CN217490863U - High-efficient solvent recovery unit - Google Patents

Abstract

The utility model discloses a high-efficient solvent recovery unit, including reation kettle, heat exchanger system, solvent recovery jar and explosion-proof solvent delivery pump, reation kettle is connected through heat exchanger system and explosion-proof solvent delivery pump respectively with the solvent recovery jar, and the solvent recovery jar is connected with level detector and sample connection, and the solvent recovery jar passes through the tee bend pipeline and is connected with explosion-proof solvent delivery pump. Through the high-efficiency solvent recovery device provided by the utility model, the reaction kettle is utilized to distill the organic solvent, and the organic solvent is condensed into liquid after passing through the heat exchanger system and enters the solvent recovery tank; the condition in the solvent recovery tank can be judged through the liquid level detector, and sampling detection can be carried out through the sampling port; can adjust each composition content of retrieving the solvent, the liquid in the accessible tee bend pipeline transfer jar, explosion-proof solvent delivery pump can be with jar interior liquid back to the reation kettle in carry out next time reaction simultaneously, the device compares with current device, easy operation, convenience, and the structure is also uncomplicated, is fit for the large tracts of land and promotes.

Description

High-efficiency solvent recovery device

Technical Field

The utility model relates to an organic chemical reaction apparatus technical field especially relates to a high-efficient solvent recovery unit.

Background

At present, people cannot walk away from chemical products in clothes and eating, and chemical reactions run through the production process of almost all chemical products. In most organic chemical reaction processes, various organic solvents are needed, and meanwhile, the organic solvents do not participate in the reaction in part of the reaction processes, so that a large amount of loss is avoided. After the reaction is finished, in order to facilitate the post-treatment, the organic solvent which does not participate in the reaction is basically distilled out, and for the organic solvent, in the industrial mass production, due to the large amount, when the waste liquid is treated, resources are wasted, and a large amount of financial resources and material resources are consumed.

In view of the above, it is necessary to provide further improvements to the current high-efficiency solvent recovery apparatus.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to solve the deficiencies in the prior art to at least a certain extent to provide a high-efficient solvent recovery device.

In order to achieve the above object, the utility model discloses a technical scheme do:

the utility model provides a high-efficient solvent recovery unit, including reation kettle, heat exchanger system, solvent recovery jar and explosion-proof solvent delivery pump, reation kettle with the solvent recovery jar passes through respectively the heat exchanger system with explosion-proof solvent delivery pump connects, the solvent recovery jar is connected with liquid level detector and sample connection, the solvent recovery jar through the tee bend pipeline with explosion-proof solvent delivery pump connects.

Further, the heat exchanger system comprises a circulating water heat exchanger and a chilled water heat exchanger which are connected with each other, the circulating water heat exchanger is connected with the reaction kettle, and the chilled water heat exchanger is connected with the solvent recovery tank.

Further, the circulating water heat exchanger is connected with the reaction kettle through a steam pipe, the chilled water heat exchanger is connected with the solvent recovery tank through a straight pipe, and a sight glass is installed on the straight pipe.

Further, still include vacuum buffer system, vacuum buffer system includes interconnect's vacuum buffer tank and vacuum pump package, the vacuum buffer tank with the solvent recovery jar is connected.

Furthermore, the solvent recovery tank is connected with the vacuum buffer tank through a vacuum pipeline, and the vacuum buffer tank is connected with the vacuum pump set through a vacuum pipeline.

Furthermore, the vacuum buffer tank is provided with a first vacuum air port, a second vacuum break valve and a first discharge valve, the first vacuum air port is connected with the solvent recovery tank, and the second vacuum air port is connected with the vacuum pump set.

Further, the vacuum pump unit is a water ring type vacuum pump unit.

Further, install second bleeder valve, first inlet pipe, second inlet pipe, visual manhole and reation kettle intermediate layer on the reation kettle, first inlet pipe with explosion-proof solvent delivery pump is connected.

Furthermore, the solvent recovery tank is connected with a first solvent inlet, a second solvent inlet, a first vacuum breaking valve and a third discharge valve, the first solvent inlet is connected with the chilled water heat exchanger, the second solvent inlet is used for being connected with a solvent raw material storage tank, the first vacuum breaking valve is connected with an extension pipeline provided with a vacuum meter, one end, far away from the first vacuum breaking valve, of the extension pipeline is connected with a ball valve, and the third discharge valve is connected with the three-way pipeline.

Further, the explosion-proof solvent delivery pump is a pneumatic diaphragm pump, a pump inlet and a pump outlet are formed in the pneumatic diaphragm pump, the pump inlet is connected with the third discharge valve through the three-way pipeline, and the pump outlet is connected with the first feeding pipe.

The utility model provides a high-efficient solvent recovery unit, including reation kettle, heat exchanger system, solvent recovery jar and explosion-proof solvent delivery pump, reation kettle with the solvent recovery jar passes through respectively the heat exchanger system with explosion-proof solvent delivery pump connects, the solvent recovery jar is connected with liquid level detector and sample connection, the solvent recovery jar through the tee bend pipeline with explosion-proof solvent delivery pump connects. By the high-efficiency solvent recovery device provided by the utility model, the reaction kettle is used for distilling the organic solvent in vacuum and heating states, and the organic solvent steam is condensed into liquid after entering the heat exchanger system and then enters the solvent recovery tank; in the distillation process, the conditions in the solvent recovery tank, such as the color and volume of the solvent in the tank, whether layering occurs or not, can be judged through a liquid level detector, and after distillation is finished, sampling can be carried out through a sampling port to detect the components of the solvent, so that the proportion of each component of the recovered solvent can be known conveniently; still can adjust in order to reach the next reaction demand each composition content of retrieving the solvent, if solvent too much in the solvent recovery jar, perhaps appear layering and do not need the tee bend pipeline transfer that can pass through solvent recovery jar below of lower floor looks, after confirming that the recovered solvent accords with the next reaction demand, then the next reaction is carried out in the explosion-proof solvent delivery pump of accessible is beaten back the interior liquid of solvent recovery jar to the reation kettle, this recovery unit compares with present current system, and easy operation, and is convenient, and the structure is also uncomplicated, and is suitable for the large tracts of land to be promoted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is the overall structure schematic diagram of the high-efficiency solvent recovery device of the present invention.

The reference numbers in the figures denote: 1-reaction kettle, 11-second discharge valve, 12-first feed pipe, 13-second feed pipe, 14-visible manhole, 15-reaction kettle interlayer, 2-heat exchanger system, 21-circulating water heat exchanger, 211-steam pipe, 22-chilled water heat exchanger, 221-straight pipe, 3-solvent recovery tank, 31-liquid level detector, 32-sampling port, 33-first solvent inlet, 34-second solvent inlet, 35-first rupture valve, 36-third discharge valve, 37-first discharge valve, 38-second discharge valve, 4-vacuum buffer system, 41-vacuum buffer tank, 411-first vacuum gas port, 412-second vacuum gas port, 413-second rupture valve, 414-first discharge valve, 42-vacuum pump group, 5-explosion-proof solvent delivery pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that the description of the invention referring to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implying any number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Please refer to fig. 1, the utility model provides a high-efficient solvent recovery unit, including reation kettle 1, heat exchanger system 2, solvent recovery jar 3 and explosion-proof solvent delivery pump 5, reation kettle 1 is connected through heat exchanger system 2 and explosion-proof solvent delivery pump 5 respectively with solvent recovery jar 3, and solvent recovery jar 3 is connected with level detector 31 and sample connection 32, and solvent recovery jar 3 is connected with explosion-proof solvent delivery pump 5 through the tee bend pipeline.

In this embodiment, high-efficient solvent recovery unit includes reation kettle 1, heat exchanger system 2, solvent recovery jar 3 and explosion-proof solvent delivery pump 5, reation kettle 1 is connected with heat exchanger system 2's one end, heat exchanger system 2's the other end is connected with solvent recovery jar 3, reation kettle 1 passes through the steam pipe and is connected with heat exchanger system 2, utilize reation kettle 1 to carry out organic solvent distillation under vacuum and the heating state, organic solvent steam in reation kettle 1 enters into heat exchanger system 2 back condensation liquid through the steam pipe, reentrant to solvent recovery jar 3 in. Wherein still install level detector 31 and sample connection 32 on solvent recovery tank 3, carry out the in-process of distilling at reation kettle 1, can judge the condition in solvent recovery tank 3 through level detector 31, like color, the volume of solvent in solvent recovery tank 3, whether layering appears, the back is accomplished in the distillation, and accessible sample connection 31 samples the solvent in the solvent recovery tank 3, detects its composition, is convenient for know the proportion of retrieving each composition of solvent. Wherein, what level detector 31 adopted in this embodiment is withstand voltage glass level gauge, and the condition in solvent recovery jar 3 can more audio-visual observation to glass level gauge, does not do the restriction to the specific model of level detector 31 here, sets for according to actual production demand.

In this embodiment, reation kettle 1 still is connected with explosion-proof solvent delivery pump 5, and explosion-proof solvent delivery pump 5 is connected with solvent recovery jar 3 through the tee bend pipeline, after the organic solvent distillation in reation kettle 1 is accomplished, perceive the solvent too much in solvent recovery jar 3 through liquid level detector 31 on solvent recovery jar 3, or appear layering and do not need the tee bend pipeline transfer that can pass through solvent recovery jar 3 below of lower floor looks, after confirming that the recovery solvent in the solvent recovery jar 3 accords with the next reaction demand, then the next reaction is carried to reation kettle 1 in with the liquid in the solvent recovery jar 3 to accessible explosion-proof solvent delivery pump 5.

Further, the heat exchanger system 2 comprises a circulating water heat exchanger 21 and a chilled water heat exchanger 22 which are connected with each other, the circulating water heat exchanger 21 is connected with the reaction kettle 1, and the chilled water heat exchanger 22 is connected with the solvent recovery tank 3.

In this embodiment, the heat exchanger system 2 is a shell-and-tube heat exchanger series system including circulating water and ice water as refrigerants, and specifically includes a circulating water heat exchanger 21 and a chilled water heat exchanger 22, and the circulating water heat exchanger 21 and the chilled water heat exchanger 22 are connected in sequence, wherein one end of the circulating water heat exchanger 21 is connected with the reaction kettle 1, the other end is connected with the chilled water heat exchanger 22, and the other end of the chilled water heat exchanger 22 connected with the circulating water heat exchanger 21 is connected with the solvent recovery tank 3. Wherein the heat exchanger system 2 is used for condensing vapor in the reaction kettle 1 into liquid and conveying the liquid into a solvent recovery tank 3.

Further, the circulating water heat exchanger 21 is connected with the reaction kettle 1 through a steam pipe 211, the chilled water heat exchanger 22 is connected with the solvent recovery tank 3 through a straight pipe 221, and a sight glass is installed on the straight pipe 221.

In this embodiment, the circulating water heat exchanger 21 is connected with the reaction kettle 1 through the steam pipe 211, the organic solvent in the reaction kettle 1 enters the circulating water heat exchanger 21 through the steam pipe 211 after being distilled, the chilled water heat exchanger 22 is connected with the solvent recovery tank 3 through the straight pipe 221 provided with the sight glass, wherein the organic solvent steam passing through the chilled water heat exchanger 22 is condensed into liquid and enters the solvent recovery tank 3 through the straight pipe 221, and the sight glass is arranged on the straight pipe 221, so that the flowing condition of the liquid in the straight pipe 221 can be observed more visually.

Further, the device also comprises a vacuum buffer system 4, wherein the vacuum buffer system 4 comprises a vacuum buffer tank 41 and a vacuum pump group 42 which are connected with each other, and the vacuum buffer tank 41 is connected with the solvent recovery tank 3.

In this embodiment, high-efficient solvent recovery unit still includes vacuum buffer system 4, and vacuum buffer system 4 is connected with solvent recovery jar 3, and vacuum buffer system 4 is used for making reation kettle 1's inside reach the negative pressure to the better organic solvent to among the reation kettle 1 distills. Wherein the vacuum buffer system 4 comprises a vacuum buffer tank 41 and a vacuum pump unit 42, the vacuum buffer tank 41 is connected with the vacuum pump unit 42, and the vacuum buffer tank 41 is connected with the solvent recovery tank 3.

In this embodiment, the vacuum buffer tank 41 is used to protect the vacuum pump unit, so as to prevent a large amount of vapor generated after the organic solvent is evaporated from entering the vacuum pump unit 42, that is, the vacuum pump unit 42 is prevented from being damaged, and at the same time, the vapor generated after the organic solvent is evaporated from escaping from the vacuum pump unit 42 to pollute the environment, and the vacuum pump unit 42 is used to make the inside of the reaction kettle 1 reach a negative pressure state in the distillation process of the organic solvent, so as to reduce the boiling point of the organic solvent and increase the distillation speed of the organic solvent.

Further, the solvent recovery tank 3 is connected to a vacuum buffer tank 41 through a vacuum line, and the vacuum buffer tank 41 is connected to a vacuum pump unit 42 through a vacuum line.

In this embodiment, the solvent recovery tank 3 is connected to a vacuum buffer tank 41 through a vacuum pipe, wherein the vacuum buffer tank and a vacuum pump group 42 are also connected through a vacuum pipe.

Further, the vacuum buffer tank 41 is provided with a first vacuum port 411, a second vacuum port 412, a second break valve 413 and a first discharge valve 414, the first vacuum port 411 is connected to the solvent recovery tank 3, and the second vacuum port 412 is connected to the vacuum pump group 42.

In this embodiment, the top end of the vacuum buffer tank 41 is provided with a first vacuum port 411, a second vacuum port 412, a second vacuum breaker 413 and a first discharge valve 414, wherein the first vacuum port 411 is connected to the solvent recovery tank 3, and the second vacuum port 412 is connected to the vacuum pump unit 42. The second vacuum relief valve 413 is used to control the vacuum state in the vacuum buffer tank 41, and the first discharge valve 414 is used to discharge the liquid in the vacuum buffer tank 41.

In this embodiment, a vacuum pressure gauge is further connected to the top end of the vacuum buffer tank 41, and the vacuum pressure gauge is used for measuring the vacuum pressure in the vacuum buffer tank 41.

Further, the vacuum pump unit 42 is a water ring vacuum pump unit.

In this embodiment, the vacuum pump unit 42 is a water ring vacuum pump, and the minimum vacuum pressure can reach-0.1 Mpa, and the specific type of the vacuum pump unit 42 is not limited herein and is set according to actual production requirements.

Further, a second discharge valve 11, a first feed pipe 12, a second feed pipe 13, a visible manhole 14 and a reaction kettle interlayer 15 are arranged on the reaction kettle 1, and the first feed pipe 12 is connected with the anti-explosion solvent delivery pump 5.

In this embodiment, the upper end of the cover of the reaction kettle 1 is further connected with a first feeding pipe 12, a second feeding pipe 13, a thermometer and a pressure gauge, the first feeding pipe 12 is used for being connected with the explosion-proof solvent delivery pump 5, and when the recovered solvent in the solvent recovery tank 3 meets the requirement of the next reaction, the liquid in the solvent recovery tank 3 can be delivered into the reaction kettle 1 through the first feeding pipe 12 by the explosion-proof solvent delivery pump 5 for the next reaction; the second feeding pipe 13 is used for inputting the organic solvent into the reaction kettle 1 for distillation; wherein a thermometer and a pressure gauge on the reaction vessel 1 are used to measure the temperature and pressure of the reaction vessel 1 at the time of distillation.

In this embodiment, visual manhole 14 is installed in reation kettle 1's front, and wherein the distillation condition in reation kettle 1 is observed to the visual manhole 14 of accessible, and reation kettle intermediate layer 15 is installed in the reation kettle 1 outside, and reation kettle intermediate layer 15 is used for circulating refrigerant or heat medium, is convenient for lower the temperature or heat for reation kettle 1, and second bleeder valve 11 is installed to reation kettle 1 bottom, and the discharging pipe is connected to second bleeder valve 11, is convenient for emit the product in reation kettle 1.

Further, the solvent recovery tank 3 is connected with a first solvent inlet 33, a second solvent inlet 34, a first air breaking valve 35 and a third discharge valve 36, the first solvent inlet 33 is connected with the chilled water heat exchanger 22, the second solvent inlet 34 is used for connecting a solvent raw material storage tank, the first air breaking valve 35 is connected with an extension pipeline provided with a vacuum gauge, one end, away from the first air breaking valve 35, of the extension pipeline is connected with a ball valve, and the third discharge valve 36 is connected with a three-way pipeline.

In this embodiment, a first solvent inlet 33, a second solvent inlet 34, a first air break valve 35 and a third discharge valve 36 are installed at the top of the solvent recovery tank 3, wherein the first solvent inlet 33 is connected with the chilled water heat exchanger 22 and is used for conveying the organic solvent condensed into liquid in the heat exchanger system 2 to the solvent recovery tank 3, and the second solvent inlet 34 is connected with a solvent raw material storage tank through a valve and a flow control meter; first broken empty valve 35 passes through the pipeline extension so that the operation, so first broken empty valve 35 is connected with the extension pipeline, be equipped with vacuum gauge and end-to-end connection ball valve on the extension pipeline simultaneously for vacuum state in the control tank, third bleeder valve 36 is installed to the bottom of solvent recovery jar 3, third bleeder valve 36 is connected with the tee bend pipeline, explosion-proof solvent delivery pump 5 and ton bucket are connected respectively to third bleeder valve 36 through the tee bend pipeline, wherein first baiting valve 37 in the tee bend pipeline connects the ton bucket, explosion-proof conveyer delivery pump 5 is connected to second baiting valve 38. And a pressure-resistant glass tube sight glass is mounted on the third discharge valve 36.

Wherein, in the distillation process of reaction kettle 1, can adjust each composition content of retrieving the solvent through second solvent import 34 and flowmeter in order to reach the next reaction demand, second solvent import 34 is connected with solvent raw materials storage tank, after the solvent in solvent recovery tank 3 needs to adjust, then add the raw materials composition that needs in the solvent of retrieving through second solvent import 34.

Further, the explosion-proof solvent delivery pump 5 is a pneumatic diaphragm pump, a pump inlet and a pump outlet are formed in the pneumatic diaphragm pump, the pump inlet is connected with the third discharging valve 36 through a three-way pipeline, and the pump outlet is connected with the first feeding pipe 12.

In this embodiment, the explosion-proof solvent delivery pump 5 is a pneumatic diaphragm pump, and is driven by compressed air, and the pneumatic diaphragm pump is provided with a pump inlet and a pump outlet, wherein the pump inlet is connected with the third discharge valve 36 of the solvent recovery tank 3 through a three-way pipeline, and the pump outlet is connected with the first feeding pipe 12 of the reaction kettle 1.

Further, high-efficient solvent recovery unit includes reation kettle 1 through the pipe connection, heat exchanger system 2, solvent recovery jar 3, explosion-proof diaphragm delivery pump 5 and vacuum buffer system 4, when carrying out organic solvent distillation recovery in reation kettle 1, close second inlet pipe 13 in proper order, first inlet pipe 12, second bleeder valve 11, second solvent import 34, third bleeder valve 36, the butterfly valve of first bleeder valve 414 department, first rupture valve 35, sample connection 32, the ball valve of second rupture valve 413 department, open water ring formula vacuum pump package, switch-on circulating water heat exchanger 21, chilled water heat exchanger 22, open the electric mixer in reation kettle 1 and the heat medium in the reation kettle intermediate layer 15 can. After the distillation of the organic solvent in the reaction kettle 1 is completed, the ball valves at the first air break valve 35 and the second air break valve 413 are sequentially opened, and the water ring type vacuum pump set, the heating medium and the electric stirrer are closed.

When carrying out organic solvent used repeatedly, open the valve of sample connection 32 department and carry out the sample detection and judge that each component content accords with the reaction demand next time, if not conform to the requirement, calculate corresponding component addition and add through second solvent import 34 (pipeline outfit flowmeter), if meet the requirement, close the pipeline ball valve of first baiting valve 37 department, open first rupture valve 35, the pipeline ball valve of second baiting valve 38 department, third baiting valve 36, pipeline butterfly valve and pneumatic diaphragm pump of first inlet pipe 12 department, the liquid level of liquid level detector 31 is observed to the pump solvent in-process in reation kettle 1 simultaneously, it can to close the ball valve and the pneumatic diaphragm pump of third bleeder valve 36 in proper order after the required volume.

The utility model provides a high-efficient solvent recovery unit, including reation kettle, heat exchanger system, solvent recovery jar and explosion-proof solvent delivery pump, reation kettle with the solvent recovery jar passes through respectively the heat exchanger system with explosion-proof solvent delivery pump connects, the solvent recovery jar is connected with liquid level detector and sample connection, the solvent recovery jar through the tee bend pipeline with explosion-proof solvent delivery pump connects. By the high-efficiency solvent recovery device provided by the utility model, the reaction kettle is used for distilling the organic solvent in vacuum and heating states, and the organic solvent steam is condensed into liquid after entering the heat exchanger system and then enters the solvent recovery tank; in the distillation process, the liquid level detector can be used for judging the conditions in the solvent recovery tank, such as the color and volume of the solvent in the tank, whether layering occurs or not, and the like, and after distillation is finished, sampling can be carried out through the sampling port to detect the components of the solvent, so that the proportion of each component of the recovered solvent can be known conveniently; still can adjust in order to reach the next reaction demand each composition content of retrieving the solvent, if solvent too much in the solvent recovery jar, perhaps appear layering and do not need the tee bend pipeline transfer that can pass through solvent recovery jar below of lower floor looks, after confirming that the recovered solvent accords with the next reaction demand, then the next reaction is carried out in the explosion-proof solvent delivery pump of accessible is beaten back the interior liquid of solvent recovery jar to the reation kettle, this recovery unit compares with present current system, and easy operation, and is convenient, and the structure is also uncomplicated, and is suitable for the large tracts of land to be promoted.

It should be noted that the embodiments of the present invention are described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is further noted that, in the present disclosure, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a high-efficient solvent recovery unit, its characterized in that, includes reation kettle, heat exchanger system, solvent recovery jar and explosion-proof solvent delivery pump, reation kettle with the solvent recovery jar passes through respectively the heat exchanger system with explosion-proof solvent delivery pump is connected, the solvent recovery jar is connected with liquid level detector and sample connection, the solvent recovery jar through the tee bend pipeline with explosion-proof solvent delivery pump is connected.

2. The apparatus according to claim 1, wherein the heat exchanger system comprises a circulating water heat exchanger and a chilled water heat exchanger, which are connected to each other, the circulating water heat exchanger is connected to the reaction kettle, and the chilled water heat exchanger is connected to the solvent recovery tank.

3. The efficient solvent recovery device of claim 2, wherein the circulating water heat exchanger is connected with the reaction kettle through a steam pipe, the chilled water heat exchanger is connected with the solvent recovery tank through a straight pipe, and a sight glass is mounted on the straight pipe.

4. The apparatus according to claim 1, further comprising a vacuum buffer system, wherein the vacuum buffer system comprises a vacuum buffer tank and a vacuum pump set connected with each other, and the vacuum buffer tank is connected with the solvent recovery tank.

5. The apparatus according to claim 4, wherein the solvent recovery tank is connected to the vacuum buffer tank through a vacuum pipe, and the vacuum buffer tank is connected to the vacuum pump unit through a vacuum pipe.

6. The apparatus according to claim 5, wherein the vacuum buffer tank is installed with a first vacuum air port, a second vacuum breaker valve and a first discharge valve, the first vacuum air port is connected to the solvent recovery tank, and the second vacuum air port is connected to the vacuum pump set.

7. The apparatus according to claim 4, wherein the vacuum pump unit is a water ring vacuum pump unit.

8. The efficient solvent recovery device of claim 2, wherein the reaction kettle is provided with a second discharge valve, a first feed pipe, a second feed pipe, a visible manhole and a reaction kettle interlayer, and the first feed pipe is connected with the explosion-proof solvent delivery pump.

9. The efficient solvent recovery device according to claim 8, wherein the solvent recovery tank is connected with a first solvent inlet, a second solvent inlet, a first vacuum breaking valve and a third discharge valve, the first solvent inlet is connected with the chilled water heat exchanger, the second solvent inlet is used for being connected with a solvent raw material storage tank, the first vacuum breaking valve is connected with an extension pipeline provided with a vacuum gauge, one end of the extension pipeline, far away from the first vacuum breaking valve, is connected with a ball valve, and the third discharge valve is connected with the three-way pipeline.

10. The apparatus according to claim 9, wherein the explosion-proof solvent delivery pump is a pneumatic diaphragm pump, the pneumatic diaphragm pump is provided with a pump inlet and a pump outlet, the pump inlet is connected to the third discharge valve via the three-way pipe, and the pump outlet is connected to the first feeding pipe.

Images